Sunlight and hot weather cause ground-level ozone to form in harmful concentrations in the air. As a result, it is known as a summertime air pollutant. Ozone Season for many states is May - September. Ozone data and forecast will stop October 2008 and resume May 2009 for these areas.
Alabama
Connecticut
Georgia
Idaho
Indiana
Iowa
Michigan
Minnesota
Mississippi
Ohio
Oregon (except Portland)
Rhode Island
South Carolina
Tennessee
Virginia
Washington (except for Puget Sound)
AIRNow is a government-backed program. Through AIRNow, EPA, NOAA, NPS, news media, tribal, state,
and local agencies work together to report conditions for ozone and particle pollution.
State, Local and Tribal Partners.